KR101715233B1 - Precision measuring supply apparatus, Quality control measuring plant apparatus for mixing of mortar and Mixing method of mortar using the same - Google Patents

Abstract

The present invention relates to a precision measuring supply apparatus that is capable of enhancing the quality of mortar during mixing of low slump mortar used in a CGS method or the like by precisely controlling an input material discharge amount and minimizing an error between an actual input material supply amount and mixing design, a quality control measuring plant apparatus for mortar manufacturing, and a mortar manufacturing method using the same. The precision measuring supply apparatus according to the present invention is a precision measuring supply apparatus comprising a transport belt and a hopper provided above the transport belt. The hopper includes: a hopper main body for input material storage; a discharge port provided in a lower portion of the hopper main body and discharging the input material in the hopper main body to the transport belt; and an adjusting plate provided to be capable of being lifted and lowered upward and downward in a lower portion of a front face of the hopper and adjusting the amount of the input material transported by the transport belt.

Description

TECHNICAL FIELD [0001] The present invention relates to a precision weighing supply apparatus, a quality control weighing plant apparatus for manufacturing mortar, and a mortar manufacturing method using the apparatus.

The present invention relates to a precision weighing device capable of increasing the quality of a mortar by precisely controlling the discharge amount of the input material in the low-flow mortar mixing used in the CGS method and minimizing the error between the mixing design and the actual feed material amount, An adjustable weighing plant apparatus and a method of manufacturing a mortar using the same.

The CGS (Compaction Grouting System) method presses the low fluidity mortar injection material with a slump value of less than 5 ~ 7 cm into the ground in a non-discharge type to form a uniform cylindrical solid structure in the ground and radially pressurizes the surrounding ground (No. 10-0209247). In this method, the soil and the air in the pores are forcibly discharged to reduce the pores between the soil particles.

In particular, the disaster prevention technology No. 77, "Simultaneous injection compaction grouting system for ground reinforcement using integrated quality control system", is used to inject mortar into multiple perforation holes simultaneously with simultaneous injection pump equipment (SI-PUMP) , The construction time is shortened, and the uniformity of the injection material and the uniform reinforcement of the ground by uniform pressure injection are made possible. In addition, by the integrated quality management system (TCS), the injection amount and the injection pressure are automatically recorded to secure the constant construction quality, thereby improving the workability and economy in soft ground, seismic and liquefaction reinforcement.

The low flow mortar used in the CGS method is composed of maras for firing and stone for increasing internal friction, and is made by mixing cement and water with maras and stones. The above method is to secure the structural stability by reinforcing soft ground, rock slab, fracture zone, sandstone and gravel layer.

Since the CGS injection material such as low-flow mortar should be manufactured so as to faithfully express the ground reinforcement effect with a predetermined viscosity and strength, the material constituting the CGS injection material must be measured and input.

The double cement is delivered in quantitative packaging, so it can be charged with the correct weight. However, it is difficult to put the maras and the stones with accurate weight because they are brought into the field in unpacked state using a dump truck.

In order to solve the above-mentioned problems, a technique for a metering device capable of metering and inputting marasites and stones was applied (Patent Application No. 10-2015-0172188, etc.).

In the above technique, an open / close plate is coupled to a lower portion of a massage hopper and a stone hopper to directly open and close a discharge port under the hopper.

By adjusting the amount of opening of the discharge opening by the opening / closing plate, the supply amount of the input material such as margarine or stoneware is adjusted or the supply amount of the input material is controlled by the rotation speed of the transfer screw provided in the discharge opening.

However, the above-described technique has a problem in that not only the input material is continuously discharged even when the discharge port is opened and closed, but also the input material adheres to the opening / closing plate and it is difficult to accurately control the discharge amount of the input material.

In order to solve the above problems, the present invention provides a precision weighing device capable of accurately controlling the discharge amount of the input material to minimize the error between the mixing design and the actual input material supply amount, thereby improving the quality of the mortar, And a mortar manufacturing method using the same.

According to a preferred embodiment of the present invention, there is provided a precision weighing apparatus comprising a conveyor belt and a hopper provided on an upper portion of the conveyor belt, wherein the hopper includes a hopper main body in which the input material is stored; A discharge port provided at a lower portion of the hopper main body to discharge the input material in the hopper main body to the conveyance belt; And a regulating plate provided on the lower part of the front surface of the hopper so as to be vertically movable up and down to regulate the amount of the input material conveyed by the conveyance belt; The conveyance belt and the hopper are connected to each other so as to be mutually supported by a frame member. The frame member is provided with a control unit for controlling the opening and closing of the throttle according to the weight measured by the load cell for measuring the weight of the conveyor belt and the hopper and the load cell And a load cell for measuring the weight of the weighing container main body, measures the unit weight of the material to be weighed in the weighing container main body, and transmits the unit weight to the control unit And a unit weight measuring unit for measuring the weighing unit.

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According to another preferred embodiment of the present invention, blocking plates extending to the upper surface of the conveyance belt are coupled to both sides of the discharge port under the hopper, respectively.

According to another preferred embodiment of the present invention, there is provided an apparatus for feeding masks, comprising: a precise metering feeder for feeding a feed material to a hopper; A fine powder supply unit configured to supply fine powder to the hopper, the fine powder supply unit being made of fine powder; A cement hopper for supplying cement and having a discharge port at the bottom; A main conveyance belt arranged to be spaced apart from the conveyance belt of the magma supply section, the conveyance belt of the abrasive powder supply section, and the discharge port of the cement hopper and conveying the supplied maras, abrasive powder and cement; And a mixer for mixing the maras, the lime and the cement transferred from the main conveyance belt with water; The present invention provides a quality control weighing plant apparatus for manufacturing mortar.

According to another preferred embodiment of the present invention, there is provided a mortar production method using the quality control mixing device for mortar production, comprising the steps of: (a) introducing maras, minerals and cement into a site; (b) measuring the unit weight of maras or quartz by injecting maras or quartz into the unit weight measuring unit, and transmitting the measured unit weight to the control unit provided in the quartz supply unit and the quartz supply unit, respectively; (c) converting the supply volume of each of the input materials according to the mixing design into the supply weight according to the unit weight of the maras and the stones received by the control unit; (d) introducing cement into the cement hopper while injecting maras and cobalt into the respective hoppers of the magma supply unit and the abrasive supply unit; (e) adjusting the throttle according to the weight of the maras and the stones produced in the step (c) to supply the maras and the stones to the main conveyance belt through the conveyance belt, and in accordance with the supply weight of the cement, Supplying cement to the belt; And (f) mixing the maras, the cobalt and the cement transferred by the main transfer belt with water to produce a mortar; The present invention provides a method for manufacturing a mortar using the quality control metering plant apparatus.

The present invention has the following effects.

First, the amount of the input material discharged per unit time can be predicted by the driving speed of the conveyance belt provided in the precision metering device and the opening area of the throttle. Therefore, by controlling the degree of opening and closing of the throttle plate, it is possible to supply the input material in an accurate amount according to the mixing design. Therefore, in the case of the low fluidity mortar used in the CGS method, the mixing design and the error of the actual input material supply amount are minimized, .

Second, when the load cell is provided on the frame member connecting the conveyance belt and the hopper, the load cell can measure the entire weight of the conveyance belt and the hopper. Therefore, it is possible to eliminate the error with the amount of the material to be mixed, and to supply the input material in an accurate amount according to the mixing design.

Thirdly, when the unit weight measuring unit is provided, it is possible to measure the mass per unit mass of the mass or the amount of the quartz, so that it is possible to manufacture the mortar by weight control by correcting the weight of the mass or the quartz based on the unit mass information.

Fourth, in the case where the shutoff plate is provided on both sides of the discharge port, the input material is caught by the throttle plate and prevented from dropping to both sides of the conveyance belt, thereby transferring the input material forward.

1 is a perspective view showing an embodiment of a precision metering and supplying apparatus of the present invention.
2 is a side view showing an embodiment of a precise metering supply apparatus of the present invention provided with a load cell;
3 is a conceptual diagram illustrating the operation of the precise metering supply apparatus of the present invention provided with the unit weight measuring unit.
4 is a perspective view showing a unit weight measuring unit.
5 is a perspective view showing an operating relationship of the opening and closing door provided in the unit weight measuring unit;
6 is a perspective view showing a unit weight measuring unit provided with a slide bar;
7 is a perspective view showing a precise metering supply device of the present invention provided with a blocking plate;
8 is a side view showing a quality control weighing plant for producing mortars of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

1 is a perspective view showing an embodiment of the precision metering supply apparatus of the present invention.

1, the precision weighing and supplying apparatus 1 of the present invention comprises a conveyor belt 11 and a hopper 12 provided at an upper portion of the conveyor belt 11. As shown in FIG.

The conveyance belt 11 is installed below the hopper 12 so as to be spaced apart from the hopper 12 by a predetermined distance and feeds the input material 10 to be fed into the hopper 12.

The hopper 12 includes a hopper body 121 in which the input material 10 is stored; A discharge port 122 provided at a lower portion of the hopper main body 121 to discharge the input material 10 in the hopper main body 121 to the conveyance belt 11; And a regulating plate (123) provided on the lower part of the front surface of the hopper (12) so as to be vertically movable up and down to regulate the amount of the input material (10) conveyed by the conveyance belt (11). .

The hopper main body 121 can be formed in a shape of an upper light bulb which becomes narrower from the upper part to the lower part as a whole.

The hopper main body 121 is filled with the input material 10 such as the maras 10a or the abrasive 10b.

The discharge port 122 is provided at a lower portion of the hopper main body 121 and discharges the supplied material 10 introduced into the hopper main body 121 to the conveyance belt 11 to supply the discharged material.

The regulating plate 123 is vertically movable up and down on the lower part of the front surface of the hopper 12 to regulate the amount of the input material 10 conveyed by the conveyance belt 11.

The amount of movement of the input material 10 discharged through the discharge port 122 to the conveyance belt 11 through the conveyance belt 11 can be adjusted by moving the regulating plate 123 up and down.

Therefore, the amount of the input material 10 discharged per unit time can be predicted by the driving speed of the conveyance belt 11 and the opening area of the regulating plate 123. And by controlling the degree of opening and closing of the throttle plate 123, the precise amount of the input material 10 can be supplied according to the mixing design.

Accordingly, it is possible to precisely control the discharge amount of the input material (10) to minimize the error between the mixing design and the actual input material (10), thereby improving the quality of the mortar.

The upward / downward movement of the throttle plate 123 can be realized by various embodiments. For example, as shown in FIG. 1, a rack gear 124 is provided on one side of the throttle plate 123, and a pinion gear 126 engaged with the rack gear 124 may be coupled to the driving bar 125.

The opening area of the throttle plate 123 can be adjusted by moving the throttle plate 123 up and down according to the rotation of the driving bar 125. [

The driving bar 125 may be driven by a driving unit 127.

The driving unit 127 may be connected to the control unit 13 and controls the driving and stopping of the driving bar 125 or the forward rotation or the reverse rotation according to an instruction from the control unit 13. [

2 is a side view showing an embodiment of a precise metering supply apparatus of the present invention provided with a load cell.

2, the conveyance belt 11 and the hopper 12 are connected to each other so as to be mutually supported by a frame member 14, and the conveyance belt 11 and the hopper 12 are connected to the frame member 14, And a control unit 13 for controlling the opening and closing of the throttle plate 123 according to the weight measured by the load cell 15 and the load cell 15.

The lower end and the upper end of the frame member 14 are respectively coupled to the conveyance belt 11 and the hopper 12 to support the hopper 12 at a predetermined interval on the conveyance belt 11.

If the viscosity of the input material 10 injected into the hopper main body 121 is large and a part of the input material 10 is bundled or the particle size distribution is not uniform, the regulating plate 123 of the hopper 12 is opened to a certain height The volume of the input material 10 supplied to the lower portion of the throttle plate 123 may not be constant.

In this case, it is advantageous to control the supply amount of the input material 10 by the weight, not the volume control.

A load cell 15 is provided directly in the hopper 12 to control the discharge amount of the input material 10 by the weight change of the hopper 12. [ However, in this method, a viscous material can be adhered to the conveyor belt 11 or the inner wall of the hopper 12, and there is a high possibility of causing an error in the amount of the input material 10 to be finally mixed.

A load cell 15 is provided in a frame member 14 connecting the conveyance belt 11 and the hopper 12 so that the load cell 15 can convey the entire weight of the conveyance belt 11 and the hopper 12 By measuring it, it is possible to supply the material with precise amount according to the blending design by eliminating the error with the amount of the material to be mixed.

That is, it is possible to accurately measure the weight of the input material 10 fed out of the conveyance belt 11.

3 is a conceptual diagram illustrating the operation of the precise metering supply apparatus of the present invention provided with the unit weight measuring unit. FIG. 4 is a perspective view showing the unit weight measuring unit, FIG. 5 is a perspective view showing an operating relationship of the opening and closing door provided in the unit weight measuring unit, and FIG. 6 is a perspective view showing a unit weight measuring unit equipped with a slide bar.

3 and 4, the precision weighing and feeding apparatus 1 is provided with a weighing container main body 161 having an internal space of a predetermined volume and an open top, and a weighing container main body 161 A weighing container main body 161, And a unit weight measuring unit 16 for measuring the unit weight of the input material 10 and transmitting the unit weight to the control unit 13.

Generally, in the specification, the cement 20 is designed to have a weight in the mortar combination design, and the massa 10a and the stone 10b are designed to have a volume. Therefore, the weight of the input material 10 to be fed is to be calculated by multiplying the calculated weight of the input material 10 by the unit weight of the input material 10 during weight control.

However, the mass of the material 10a or 10b is different depending on the moisture content of the material to be brought into the site, and the unit weight of the material 10 is not constant.

Accordingly, in the present invention, the unit weight of the martha 10a or the stone 10b carried in the site is measured in advance, and the measured unit weight is transmitted to the control unit 13 by wire or wireless.

The control unit 13 corrects and controls the weight of the input material 10 to be supplied according to the received unit weight information.

The input material 10 brought into the field is put into the weighing container main body 161 and the upper surface is evenly flattened so as to coincide with the upper end of the weighing container main body 161 and then the weight is measured and divided into the inner space of the weighing container main body 161 The unit weight of the material 10 can be calculated.

As shown in FIG. 5, the metering container main body 161 may include an opening / closing door 163 at one side thereof.

Accordingly, it is possible to discharge the input material 10 whose unit weight is measured through the opening / closing door 163 provided on the side of the weighing container main body 161 to the outside.

The bottom surface of the weighing container main body 161 can be configured to be inclined downward toward the opening / closing door 163 to easily discharge the input material 10.

Although not shown in the drawing, it is also possible to rotate the weighing container main body 161 and discharge the input material 10 through the upper part of the opened weighing container main body 161.

6, a slide bar 164 which can flatten the upper surface of the input material 10 can be coupled to the upper part of the weighing container main body 161. As shown in FIG.

For example, the slide bar 164 slides along the protruding bar provided on both sides of the top of the weighing container main body 161 from the one side to the other side of the weighing container main body 161, The material 10 is cut out to flatten the upper surface of the input material 10.

Fig. 7 is a perspective view showing a precise metering supply device of the present invention having a shielding plate.

7, a blocking plate 128 extending to the upper surface of the conveyance belt 11 may be coupled to both sides of the discharge port 122 under the hopper 12.

The adjusting plate 123 adjusts the amount of the input material 10 discharged from the conveyance belt 11 so that the input material 10 discharged from the hopper main body 121 is hooked on the throttle plate 123, The belt 11 can be released to both sides.

A blocking plate 128 is provided on both sides of the discharge port 122 so as to guide the movement of the input material 10 so that the discharged input material 10 can be properly transported forward without being dropped to the side surface of the conveyance belt 11. [ .

8 is a side view showing a quality control weighing plant for producing mortar according to the present invention.

As shown in FIG. 8, the quality control weighing plant apparatus for producing mortar according to the present invention is a device for supplying a massa 10a, which is composed of the precise metering feeder 1 and is provided with a feed material 10 supplied to the hopper 12a, A mass supply part 1a which is a massar 10a; A stonemason feeder 1b composed of the precise metering feeder 1 for feeding the stoner 10b and the input material 10 supplied to the hopper 12b is a stonewall 10b; A cement hopper 2 for supplying the cement 20 and having a discharge port at the bottom thereof; The masses 10a, 10b, and 10c, which are installed so as to be spaced apart from the conveyance belt 11a of the magma supplying section 1a, the conveyance belt 11b of the powder feeding section 1b, and the discharge port of the cement hopper 2, A main conveyance belt 3 for conveying the cement 20; And a mixing unit 4 for mixing the maras 10a, the stone 10b and the cement 20 transferred from the main conveyance belt 3 with water; . ≪ / RTI >

Massa 10a is formed by weathering granite for a long time and uses cohesive soil having a viscous component of 4 mm or less instead of sand to secure firing such that the mortar has low fluidity.

The stone 10b is a crushed stone aggregate having a size of 10 mm or less and contributes to increase the internal friction force and strength of the mortar.

The masses 10a and 10b are highly viscous and have different physical properties each time they are brought into the field, so that it is difficult to precisely inject the masses 10a and 10b when they are supplied using a general hopper.

Therefore, the quantity of the masses 10a and 10b is precisely measured and supplied through the precise metering supply device 1 of the present invention.

On the other hand, since the cement 20 is brought into the field in a packed state, the quality is uniform and is dry, so that it is easy to manage the mortar during manufacturing.

Thus, the cement 20 can be supplied using a general hopper.

The masses 10a and 10b are supplied to the main conveyance belt 3 via the conveyance belts 11a and 11b of the precise metering and supplying device 1 of the present invention and the cement 20 is directly conveyed And is supplied to the belt 3.

The main conveyance belt 3 transfers the supplied maras 10a, the stone 10b and the cement 20 to the mixing unit 4.

The massa 10a, the stone 10b and the cement 20 fall from the discharge ports of the conveyor belts 11a and 11b and the cement hopper 2 to the upper part of the main conveyor belt 3 and are discharged toward the mixing unit 4 .

The mixing unit 4 mixes the maras 10a, the stone 10b and the cement 20, which are transferred from the main conveyance belt 3, with water.

At this time, water is supplied to the mixing unit 4 at a predetermined ratio, and the mixed mortar 10a, the stone 10b and the cement 20 are mixed to produce a mortar. The mortar thus produced may have a low fluidity characteristic such that the slump value is 5 to 7 cm or less.

The mixture stirred in the mixing unit 4 is transferred to a pump (not shown), and is pressurized in the CGS method to consolidate the surrounding ground to improve the ground.

In addition, the present invention includes a mortar manufacturing method using the quality control mixing device for producing mortar.

The method for manufacturing a mortar using a quality control mixing device for producing mortar according to the present invention comprises the steps of: (a) loading a mara (10a), a stone (10b) and a cement (20) into a site; (b) a weighing container main body 161 having an opened upper portion and having a constant volume and a load cell 162 for measuring the weight of the weighing container main body 161, The mass of the mass 10a or the mass 10b is measured by feeding the mass 10a or the mass 10b into the mass measuring unit 16 for measuring the mass of the mass 10, To the control unit (13) provided in the mass supply unit (1a) and the abrasive supply unit (1b), respectively; (c) converting the supply volume of each input material 10 according to the mixing design into the supply weight according to the unit weight of the maras 10a and the stone 10b received by the controller 13; (d) The masher 10a and the stone powder 10b are charged into the respective hoppers 12a and 12b of the magma supplying section 1a and the stone powder supplying section 1b while the cement 20 is charged into the cement hopper 2 ; (e) Adjusting the adjusting plate 123 according to the feeding weight of the marth 10a and the stone 10b calculated in the step (c), and feeding the marth 10a to the main feeding belt 3 through the feeding belt 11, Supplying the cement 20 with the main transfer belt 3 in accordance with the supply weight of the cement 20 according to the mixing design while supplying the cement 20 with the abrasive 10b; And (f) mixing the martha 10a, the stone 10b and the cement 20 conveyed by the main conveyance belt 3 with water to produce a mortar; .

In the step (b), as shown in FIG. 3 to FIG. 6, the mask 10a or the stone 10b brought into the field is put into the weighing container main body 161, And the weight is measured and divided into the internal space of the weighing container main body 161 to calculate the unit weight so that the mortar can be manufactured by weight control.

As shown in FIG. 5, the metering container main body 161 may be provided with an opening / closing door 163 at one side thereof so as to discharge the input material 10 whose unit weight is measured, A slide bar 164 capable of flattening the upper surface of the input material 10 may be coupled to the upper portion of the slide member 161.

In addition, in the step (e), the supply amount of the masses 10a and 10b can be accurately controlled according to the mixing design by controlling the degree of opening and closing by regulating the throttle 123, It is supplied in a fixed amount.

Accordingly, in step (f), the mortar 10a, the stone 10b and the cement 20, which are supplied in a predetermined amount, can be mixed with water, thereby making it possible to accurately manufacture the mortar according to the mixing design.

1: Precision metering supply device 1a: Mass supply section
1b: stoneware supply part 10: input material
10a: Martha 10b: Stone
11, 11a, 11b: conveying belt 2: cement hopper
3: Main transport belt 4: Mixing section
12, 12a, 12b: hopper 121: hopper body
122: discharge port 123: throttle plate
124: Rack gear 125: Drive bar
126: Pinion gear 127:
128: blocking plate 13:
14: frame member 15: load cell
16: Unit weight measuring unit 161:
162: load cell 163: opening / closing door
164: Slide bar 20: Cement

Claims (6)

And a hopper (12) provided on the conveying belt (11) and above the conveying belt (11). The precision weighing and feeding device (1)
The hopper 12 includes a hopper body 121 in which the input material 10 is stored; A discharge port 122 provided at a lower portion of the hopper main body 121 to discharge the input material 10 in the hopper main body 121 to the conveyance belt 11; And a regulating plate (123) provided on the lower part of the front surface of the hopper (12) so as to be vertically movable up and down to regulate the amount of the input material (10) conveyed by the conveyance belt (11). Lt; / RTI >
The conveyance belt 11 and the hopper 12 are connected to each other so as to be mutually supported by a frame member 14 and the frame member 14 is provided with a conveyance belt 11 and a load cell 15 for measuring the weight of the hopper 12 And a control unit 13 for controlling opening and closing of the throttle plate 123 according to the weight measured by the load cell 15,
And a load cell 162 for measuring the weight of the weighing container main body 161. The weight of the weighing container main body 161 and the weight of the weighing container main body 161 are measured by the weighing container main body 161, And a unit weight measuring unit (16) for measuring the unit weight of the unit weight and transmitting the unit weight to the control unit (13).
delete delete The method of claim 1,
Wherein a blocking plate (128) extending to the upper surface of the conveyance belt (11) is coupled to both sides of the discharge port (122) below the hopper (12).
A mass supply part 1a composed of a precision metering supply device 1 according to the first aspect for supplying the masses 10a and in which the input material 10 supplied to the hopper 12a is a mass 10a;
A stonemason feeder 1b composed of a precise metering and feeding device 1 according to the first embodiment for feeding the stone 10b and the input material 10 supplied to the hopper 12b is a stone 10b;
A cement hopper 2 for supplying the cement 20 and having a discharge port at the bottom thereof;
The masses 10a, 10b, and 10c, which are installed so as to be spaced apart from the conveyance belt 11a of the magma supplying section 1a, the conveyance belt 11b of the powder feeding section 1b and the discharge port of the cement hopper 2, A main conveyance belt 3 for conveying the cement 20; And
A mixing unit 4 for mixing the margarine 10a, the stone 10b and the cement 20 transferred from the main conveyance belt 3 with water; And the quality control plant apparatus for quality control for mortar production.
A mortar production method using a quality control mixing device for producing mortar according to claim 5,
(a) bringing marathon 10a, stone 10b and cement 20 into the field;
(b) The mass of the mass 10a or the mass of the mass 10b is measured by feeding the mass 10a or the mass 10b into the mass measuring unit 16, To the control unit (13) provided in the stonemason supply unit (1b);
(c) converting the supply volume of each input material 10 according to the mixing design into the supply weight according to the unit weight of the maras 10a and the stone 10b received by the controller 13;
(d) The masher 10a and the stone powder 10b are charged into the respective hoppers 12a and 12b of the magma supplying section 1a and the stone powder supplying section 1b while the cement 20 is charged into the cement hopper 2 ;
(e) Adjusting the adjusting plate 123 according to the feeding weight of the marth 10a and the stone 10b calculated in the step (c), and feeding the marth 10a to the main feeding belt 3 through the feeding belt 11, Supplying the cement 20 with the main transfer belt 3 in accordance with the supply weight of the cement 20 according to the mixing design while supplying the cement 20 with the abrasive 10b; And
(f) mixing the martha 10a, the stone 10b and the cement 20 conveyed by the main conveyance belt 3 with water to produce a mortar; Wherein the quality control plant apparatus comprises:

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